Trimming attachment for sewing-machines



(No Mode l'.) 2 Sheets-Sheet 1-..-

G'. H. INMAN.

TRIMMING ATTAGHMENT FOR SEWING MAGHINBS No. 258,069. Patented May 16, 1882..

n Modem 2 Sheets+Sheet 2.

l G. H. INMAN.

TRIMMING ATTACHMENT .FOR SEWING MACHINES- NO. 258,069.

Patented May 16, 18 82..

' cured one end of a bent lever, K, the other ments in trimmers or trimming attachments UNITED STATES GILBERT H. INMAN, OF AMSTERDAM, NEW YORK..

TRIMMING ATTACHMENT SPEOIFICATIONfOrming part of Letters oR SEWING-MACHINES.

Patent No. 258,069, dated May 16, 1882.

Application filed February 21, 1882. (No model.)

To all whom it may concern:

Be it known that I, GILBERT H. INMAN, of Amsterdam, in the county of Montgomery, and in the State of New York, have invented oer-- tain new and useful Improvements in Trimming Attachments for Sewing-Machines; and I do hereby declarethat the following is a full, clear, and exactdescription thereof, reference being bad to the accompanying drawings, and to the letters of reference marked thereon, making a partof this specification.

This invention relates to certain improvefor sewing-machines; and it has forits objects to provide a device which may be attached to the bed of a sewing-machine and connected with the working parts thereof in such manner as to trim the edges of the fabric at any desired distance from 'the seam as the fabric is stitched, as more fully hereinafter specified. These objects I attain by the device and mechanism illustrated in the accompanying drawings, in which- Figure 1 represents a front view of a sewing-machine with my device applied thereto; Fig. 2, a side elevation of the machine, show ing my device in position; Fig. 3, a top, view of the machine, showing my device; Fig. 4, a perspective view of the device detached; and Fig. 5 represents adetached perspective view, showing the means of attaching and adj listing the stationary blade.

I The letter A indicates a metallicplate, s1otted, as indicated by the letter B, and adapted to be secured to the bed of the machine 0 by means of the set-screws E. The said plateis provided with standards F G H, forming bearings for a rock-shaft, I, to which is rigidly seend of which is provided with a ball, L, to which is secured the upper strap of a link, M, the lower strap, N, of which is attached to a wrist-pin, P, on the disk R, secured to one end of the driving-shaft S of the machine. The lever K is split, as indicated by the letter T, and is adjustably secured to the rock-shaft I by means of binding-screws U. The lower portion of the forward part of the plate A is provided with a transverse vertical slot, V, in which is clamped a stationary shear-blade, W;

and to the head Yof the rock-shaft I is secured a vibrating shear-blade, Z, which is adapted to 'work in conjunction with the stationary blade to trim the fabric as it is stitched.

The operation of my invention is as follows: The plate is adjusted to the bed of the machine by meansof the set-screws in such position as to present the shears properly to the edge of the cloth. The bent lever being connected with the link, upon operating the machine the fee h mechanism, as the stitches are formed, advances the edge of the fabric to the shears, which properly trim such edge. The machine employed is such as to make an elastic stitch, such as the Grover & Baker or other doublethread lock-stitch.

The rock-shaft I is spring, A, which keeps the cutting-edges of the two blades in contact with each other, the rock-shaft having a slight endwise movement for the purpose.

The peculiar shape and method of attachment of the stationary blade permit it to be setalong or adjusted as it becomes worn, the adjustment being effected by means of thesetscrew, the shank of the blade being capable of amovement back and forth in its slot or seat for the purpose.

Having described my invention,what Iclaim, and desire to secure by Letters Patent, is-

In combination with the plate adapted to be adjusted to the bed of the machine, the rockshaft journaled in hearings in suitable standards on said plate, the bent lever adjdstably secured to the rock-shaft and adapted to be connected with the operating mechanism of the machine, the stationary shear-blade secured to the plate and adapted to be adjusted longitudinallyin line with its cutting-edge, and the vibrating blade secured to the rock-shaft, the whole arranged to operate substantially as specified.

In testimony whereof I affix my signature, in presence of two witnesses, this lOthday-of February, 1882.

GILBERT H. INMAN.

provided with a spiral' 

